Headlight Cleaner Switch Circuit

WIPER AND WASHER: WIPER AND WASHER SYSTEM: Headlight Cleaner Switch Circuit
- Headlight Cleaner Switch Circuit

DESCRIPTION

This circuit detects the conditions of the headlight control rheostat.

The headlight cleaner control relay receives the following signals through the CAN line:

* Headlight control rheostat signal

* Headlight operating signal

* Daytime running light operating signal

* Front washer motor operating signal

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. CHECK FRONT LIGHT ECU (HDLO SIGNAL)

(a) Measure the voltage according to the value(s) in the table below.

Standard voltage:

NG -- CHECK HARNESS AND CONNECTOR (CONTROL RELAY - FRONT LIGHT ECU)
OK -- Continue to next step.

2. CHECK FRONT LIGHT ECU (FRWA SIGNAL)

(a) Measure the voltage according to the value(s) in the table below.

Standard voltage:

NG -- CHECK HARNESS AND CONNECTOR (CONTROL RELAY - FRONT LIGHT ECU)
OK -- Continue to next step.

3. CHECK HARNESS AND CONNECTOR (RHEOSTAT - BODY GROUND)

(a) Disconnect the L8 rheostat connector.

(b) Measure the voltage according to the value(s) in the table below.

Standard voltage:

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

4. CHECK HEADLIGHT CLEANER CONTROL RELAY

(a) Disconnect the A6 relay connector.

(b) Measure the voltage according to the value(s) in the table below.

Standard voltage:

NG -- CHECK HARNESS AND CONNECTOR (CONTROL RELAY - FRONT LIGHT ECU)

OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

5. CHECK HARNESS AND CONNECTOR (CONTROL RELAY - FRONT LIGHT ECU)

(a) Disconnect the A6 relay connector.

(b) Disconnect the A51 ECU connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard resistance:

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

6. CHECK HARNESS AND CONNECTOR (CONTROL RELAY - FRONT LIGHT ECU)

(a) Disconnect the A6 relay connector.

(b) Disconnect the A51 ECU connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard resistance:

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

7. CHECK HARNESS AND CONNECTOR (CONTROL RELAY - FRONT LIGHT ECU)

(a) Disconnect the A6 relay connector.

(b) Disconnect the A51 ECU connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard resistance:

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE